Pott'd People (US) review for Duplify ‑ Duplicate Store

Have used this app now to duplicate two site domains. So incredibly easy & had previously paid thousands for the work this app does in hours I can see there are some poor reviews which look completely unjustified...Are these sellers expecting the app to copy across all of its custom functionalities & guess at how their website is built. If you have a simple shopify theme and don't have tens of thousands of products I would highly, highly recommend